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Über die Freisetzung von Spaltprodukten aus kugelförmigen Brennelementen (speziell über das System: Cäsium-Matrixgraphit in strömendem Helium)



1981
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte der Kernforschungsanlage Jülich 1703, 46 p. ()

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Report No.: Juel-1703

Abstract: The release from a sphere doped with fission products into a flowing gas medium is dealt with theoretically, taking into account Fick's diffusion and introducing an a-parameter, which describes the characteristic of the release kinetics at the surface of the sphere. The theoretical statements are compared with experiments, which refer to the system: caesium-matrixgraphite-helium. For the experimental investigations a testing facility especially adjusted to the subject was built. This testing facility is described. Due to our results performed in the temperature range between 900 °C and 1100 °C we can conclude that the desorption of fission products can be described with the proposed model. In this connection the experimentally determined data of the diffusion constant (D), the $\alpha$-parameter ($\alpha$), the evaporation coefficient ($\alpha$ $_{v}$) and the Henry-constant (K) are indicated for the considered system.


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

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 Record created 2016-08-29, last modified 2021-01-29


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